Table 1.

Analyzed chemical composition of experimental diets

Item	FT5	OR6
Dry matter, %	94.6	93.8
	Dry matter basis
Organic matter, %	91.7	92.2
Ash, %	8.3	7.8
Crude protein, %	44.4	40.5
Acid-hydrolyzed fat, %	18.5	22.8
Total dietary fiber, %	19.3	13.4
Insoluble fiber, %	11.8	11.0
Soluble fiber, %	7.5	2.4
Nitrogen-free extract1, %	9.5	15.5
Gross energy2, kcal/g	5.35	5.57
Metabolizable energy (ME)NRC3, kcal/g	4.76	5.01
MEMA4, kcal/g	3.46	3.90
Crude protein intake (g)/caloric intake (Mcal)NRC	93.3	80.8
Crude protein intake (g)/caloric intake (Mcal)MA	128.3	103.8
Acid-hydrolyzed fat intake (g)/caloric intake (Mcal)NRC	38.9	45.5
Total dietary fiber intake (g)/caloric intake (Mcal)NRC	40.5	26.7
Insoluble fiber intake (g)/caloric intake (Mcal)NRC	24.8	22.0
Soluble fiber intake (g)/caloric intake (Mcal)NRC	15.8	4.8

¹Nitrogen-free extract = 100 − (ash + crude protein + acid-hydrolyzed fat + total dietary fiber).

²Measured by bomb calorimetry.

³ $M{E}_{NRC}\left\{\frac{\mathrm{k}\mathrm{c}\mathrm{a}\mathrm{l}}{100\mathrm{g}}\right\}=\mathrm{g}\mathrm{r}\mathrm{o}\mathrm{s}\mathrm{s}\mathrm{e}\mathrm{n}\mathrm{e}\mathrm{r}\mathrm{g}\mathrm{y}\left\{\frac{\mathrm{k}\mathrm{c}\mathrm{a}\mathrm{l}}{100\mathrm{g}}\right\}\times \left(\frac{95.6-[0.89\times \mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}\mathrm{d}\mathrm{i}\mathrm{e}\mathrm{t}\mathrm{a}\mathrm{r}\mathrm{y}\mathrm{f}\mathrm{i}\mathrm{b}\mathrm{e}\mathrm{r}\{\mathrm{\%}\}]}{100}\right)-(0.77\times \mathrm{c}\mathrm{r}\mathrm{u}\mathrm{d}\mathrm{e}\mathrm{p}\mathrm{r}\mathrm{o}\mathrm{t}\mathrm{e}\mathrm{i}\mathrm{n}\{\mathrm{\%}\})$

⁴ME_MA (kcal/g) = (3.5 × crude protein) + (8.5 × crude fat) + (3.5 × nitrogen-free extract).

⁵Fit & Trim diet (Orijen; Champion Petfoods, Edmonton, Canada): Chicken, chicken liver, whole herring, turkey, turkey giblets (liver, heart, gizzard), flounder, eggs, cod, dehydrated chicken liver, dehydrated egg, dehydrated sardine, dehydrated chicken, dehydrated turkey, dehydrated herring, whole red lentils, whole pinto beans, whole peas, whole navy beans, chicken fat, natural fish flavor, dehydrated pumpkin, lentil fiber, whole green lentils, whole chickpeas, chicken heart, pea starch, lentil starch, choline chloride, dried kelp, zinc proteinate, whole pumpkin, whole butternut squash, whole apples, whole pears, collard greens, mixed tocopherols (preservative), thiamine mononitrate, niacin, pyridoxine hydrochloride, vitamin E supplement, dried chicory root, turmeric, sarsaparilla root, althea root, rosehips, juniper berries, citric acid (preservative), rosemary extract, dried Lactobacillus acidophilus fermentation product, dried Bifidobacterium animalis fermentation product, and dried Lactobacillus casei fermentation product.

⁶Original diet (Orijen; Champion Petfoods, Edmonton, Canada): Chicken, turkey, whole mackerel, turkey giblets (liver, heart, gizzard), flounder, chicken liver, whole herring, eggs, dehydrated chicken, dehydrated turkey, dehydrated mackerel, dehydrated chicken liver, dehydrated egg, chicken fat, whole red lentils, whole pinto beans, whole peas, whole green lentils, whole chickpeas, natural chicken flavor, whole navy beans, pollock oil, lentil fiber, pea starch, chicken heart, choline chloride, dried kelp, mixed tocopherols (preservative), vitamin E supplement, zinc proteinate, whole cranberries, whole pumpkin, whole butternut squash, collard greens, whole apples, whole pears, copper proteinate, thiamine mononitrate, niacin, pyridoxine hydrochloride, dried chicory root, turmeric, sarsaparilla root, althea root, rosehips, juniper berries, citric acid (preservative), rosemary extract, dried Lactobacillus acidophilus fermentation product, dried Bifidobacterium animalis fermentation product, and dried Lactobacillus casei fermentation product.